b. y=10x
Step-by-step explanation:
here, x represents time(minutes) : 0.51
1.5
2
2.5
y represents distance (miles): 5
10
15
20
25
to write any equation(linear) basically we need 2 points lying on itlet the 2 points be: (1,10) and (2,20) [from the given information]
now, let (A,B) and (C,D) are two points on a linethen the equation of it can be given as :
so, here the required equation will be, therefore, option c represents the relationship between x and y.[trick: when you have options, you can directly substitute x and respective y values and check if the equation satisfies it. the equation which satisfies all the x and respective y values will be the correct equation.]